Mine drill



Jan. 24, 1928. 1,657,339

. c. R. ANDERSON MINE DRILL Filed Dec; 10. 1921 a Sheets-Sheet, 1

INVENTOR Jan. 24,1928. v

. C- R- ANDERSON 5 ,339

MINE DRILL Filed Dec. 10. 1921 3 Sheets-Sheet 2 l i i '9 n i I 9 a 10 L 10 10 I a l l I l i I I l l I I I 1 l I I INVENTOR Jan. .24,- 1928.

' C. R. ANDERSON MINE DRILL Filed Dec. 10. "1921 3 Sheets-Sheet 3 1O 14 g 16 L l I llIllllllll I -81 11 "15 L: L 26 M i r, i I Z5 \Z4' 24/ 2 lys/ 139.19. v A z], I II I I I, I I i' E 5 I I: l 5 2 INVENTOR Patenteddan. e4, 192

CECIL ANDERSON, 0F PITTSBURGH, PENNSYIJVANIA. i

MINE DRILL.

Application filed December 10, 1921. Serial No. 521,374.

The present invention relates broadly to mining tools and implements, and more particularly to mine drills or augersl It has heretofore been customary in the art to which this invention relates to provide the threaded boxings for the threaded feed bars of the drills or angers with pins, keys or clamps adapted to hold the pivoted sections of the boxings in closed position about the feed bars. Due to the conditions under which apparatus of this character is used, independent holding means of this character is objectionable as the keys, pins and clamps become loose or distorted through use due to the fact that poor lighting conditions frequently result in the miners striking the keys or clamps unevenly, or become lost when detached. r

By the present invention, thesedisadvantages are entirely overcome, and there is provided means which is easily operated for holding the pivotally connected sections of the threaded boxings in closed position about the feed bars. Also, with the present invention, the holding means is rendered effective automatically upon the positioning of the boxings in the supports provided therefor. i i I The foregoing and other objects of the present invention, together with their at: tendant advantages, will be apparent as the invention becomes better understood by reference to the accompanying specification and drawings forming a part thereof, itbeing premised that changes may be made in the details of construction and manner of operation without departing from the spirit of my invention or the scope of my broader claims. T

Figure l is a perspective view of one form of apparatus embodying the present invention' 1 Figure 2 is a detail sectional view of a portion of the apparatus illustrated in Figure 1; a

Figure 3 is an end elevation of the threaded boxing shown in Figures 1 and'2; Figure 4 is a detail view, partly broken away, of the boxing shown in Figure 2 in position on the support, the support being shown in section;

Figure 5 is a side elevation of. a slightly modified form of boxingin position as illustrated in Figure 4; t

Figure 6 is an end elevation of a still further modified construction;

Figure 7 is a sectional view on the line VIIVII of Figure 6, the boxing being moved;

Figure 8 is a side elevation of a modified form of apparatus embodying the present HIVQIItlOIi; 1

Figure 9 is a detail view of the construction illustrated in Figure 8;

Figure 10 is a view, similar to Figure 9, illustrating a slightly modified construction;

Figure'll is a side elevation of a modified form of chair, and

Figures 12 and 13 are side elevations of A boxings embodying modifications of the present invention and adapted to be used with the chair shown in Figure 11. a

Referring more particularly to Figures 1 to 4, both inclusive, of the drawings, there is illustrated an apparatus embodying a post comprising side bars 2 having their opposite ends connected by suitable heads 3. Carried by the upper head 3 is an adjustable jack screw 4 adapted to be forced into engage ment with the roof of a mine shaft, while carried by the lower head 3 is an adjustable foot 5. y

Adjustable vertically on the sidebars 2 is a slide 6 adapted to be clamped in adjusted position by a suitable clamping device 7. These features of the invention are well known in the-art, and constitute no essential part of the present invention. The slide 6,

however, has extending transversely thereof a pin 8, adjacent the opposite ends of which are shoulders or bosses '9. Adaptedto be supported by theslide 6 is a threaded box- I ing comprising pivotally connected sections- 10. Each of these sections'has projecting between the oppositely disposed faces of the bosses 9, whereby when the threaded boxing threaded feed bar 14 carrying an operating crank 15 at one end thereof and a driller auger 16 at the opposlte end;

In Figure 5 there isrillustreted slightly modified form of boxing in which each of the eections 1%) thereof carries but peeing-1e lug 17 having oppositely dieposetlihee-ring surfaces El8-1iorieoopeimtionwiththe :pin 8. These lugs are ul soteo disposed-that the dis tancejlheteteen the :jOlliiGl dimes corresponds substantially to the flistenoe ihetmeen the mid jacent faces of the bosses 9 whereby the bosses :sem'e ito hold the hoziing'in ielosed position about ithe tfeed i her without the "provision of extraneous fastening pins, keys or clumps. i i p In Figures 6 mind 1? there is-iilluetlieted Ea .moilifietlformio ze'lide 43" hfii il giL connecting-yoke 19 iniplace elf the pin :8. With 1311.115 uonstruotioneueh of the portions nonnected by the yoke 19 is provided with an ungulmrlydisposed open topped bowing 20 adapted :to iueedily meceiue ip-lzojectingnpins 21 iiormed ion the sections L01 of sthew threaded boxing. \Vith itli is .cQn-strl'lfitiull, the idiirr tense -between the outer ends "of the projeofiing pins :21 substantially corresponde to the distance ihetween the inner "feces or. i the connected portions of the supportingwslide, whereby it islneeessery only to place the pants in position to lefliectively hold the i003;- ing in operative trelation to the threaded i eed'bair. v y i n Figure 1-8 t e present invention-1S show applied to mining apparatus of the type which embddiesm gripiibar in plaeeot a post. These grip fibers .ere usually held in positionby e gulp wedge :23, and irrepreihifilfidygwglth .a .series of openings 24: formed tl leuein to lGCElVB the tell 2 5 ota supporting chem26- Theseichel e commenced in tune than to the slides, or ie uimleu structures u ed t r ip s sure employed, enclithe {genera-il term support?,us iused throughout he. speeificutien wand eleims is iirrtendedy to n lude li h rations modifiqetions of this are n H1319? i heir 126 ha sflit isicleiphr on eonneeted by pin 8. :prorided with end bosses r9". 1 The mem illustrated in :FiigfunesB and 9Woo ire pondsaexaetlyi to therhozring shoum Figures '1 we; 'both inolusiute, end the same reference ohairaetens J-heve heen opened-thereto. 1' it En Figure 10 there is illustretede slightly modified FCiQllStlllQtliOlliiIl which the chair 32.6 has the side portions thereof provided with iengulerly extending rOPEIl topped .zbearings 20, as shown in Figures (3 and 7', adapted to cooperate with a boxing oi the nmistruciztion illustrated in said figures.

In Figure 11 the chair 28 is illustrated as ln wing heering pins 29 1 rojeeting inwardly from ithe side portionsthereof. ifhese heuring pins are adapted to cooperate with hear inged-Sockets $59 as shown .inliigure 152, norresponding in function to the construction i-lluetruted in Figures 1 to 4h or with hearing sockets 31, as illustrated in il i ruru 11.25 and eWFBePondiug iin ifunetion with the eonetrum tion illustrated 1n Figure 5.

"With ell oiithe eoimtruolions i.ll.ustruted e boxing support liming relatively lfixed ides, in feed screw, a separable rboniug surrounding it-he feed isoremfldiormed 30f :eube stantially similarly shaped members, h art ngson ithe boningirund ,eupport for irnekebl eupporting the boxing ebout yen axis iexten L i ing transversely itethenxis of the feed sure; said bearings being; arranged to main tain the fboxing iin a fixed moulding position about the. [feed screw, regardless of the womb ring pressure :on the screw,euhetmntiallyme described. i

i 2. 1311 on eppwretus of fiberglass idesouibed, a. boxing support having relatively fixed sides n dfeed screw, :1 iseparehle honingieuu rounding the feed screw formed rod? substantially similarly shaped me nhure, means ifor .roelmhly eupporting the honing about an urns extending 'trarneuereely toithe fll xifi lot the dieed screw iund for maintuimlsng the box prising ya bearing fame on itheisu 'aport on opposite sides of the deed serum, und ibeerg ingzfeeee on the? boring imemhere engaging ill) ring aibout the feed iserejw, iseid enemas mom:

the bearing faces on the support, substanitiellyias des ribed.

1111mm uppzu'utusiof the clues deecmibutl, a boxing support having side members, means on said side. members for supporting a honing lfior -,n1ovement ehout mu asxie lee:- tendingfrom oneside to the other, parallel -beeringyrteoes on the sides in planes lat right angles tozsaid axis, a boxing {formed of two members hinged to euehiother, and means "on each boxing member for engaging the each of the means on the boxing i i g :taceiengagmg one of the hearing on lboxingqsupportingmeans on the isupport, we

the support to retain the boxing in its closed position.

4. In an apparatus of the class described, a feed screw, a boxing support comprising spaced side members, and a sectional boxing adapted to be carried bysaid members, each section of the boxing having projections the outermost side and end portions of which are engaged by the boxing support, whereby the sections are held in closed position by said members when carried thereby, substantially as described.

5. A boxing for a mine drill feed screw having two similar members hinged to each other, each member having a bearing lug arranged to engage a bearing on a support to permit the boxing to be rocked about an axis transverse to the axis of the feed screw, and a bearing face on each lug in a plane perpendicular to the axis about which the boxing is rocked, said faces being spaced at a conslderable distance apart and arranged to engage similarly spaced faces on the support for retaining the boxing closed, sub stantially as described. 7

6. In an apparatus of the character described, a feed screw, a boxing comprisingrelatively movable sections, means on each oi said sections adapted to cooperate with a boxing supporting means, and boxing my hand.

CECIL R. ANDERSON. 

